We get the question a lot. It's probably the question people ask most.

You can always call us to ask about what size tankless electric water heater you need. You can also go to our website to see what tankless water heater you need by using our chart right on the miamiwaterheater.com home page.

Always give your self a cushion when sizing your tankless electric water heater and if you're unsure, you can always call us at 305-633-2656.

This video should help you determine whether you need a RHEEM RTEX 13, RHEEM RTEX-18 or RHEEM RTEX-27.

Remember that Miami Water Heater has the best prices and warranty on these units.

Water heaters is all we've done since 1949.